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Kitkat1
 one year ago
A pencil at a stationery store costs $1, and a pen costs $1.50. Stella spent $21 at the store. She bought a total of 18 items. Which system of equations can be used to find the number of pencils (x) and pens (y) she bought? (5 points)
1.5x + y = 21
x = 18y
18x + y = 21
x = 1.5y
x + 1.5y = 21
x + y = 18
x + 18y = 21
x = 1.5y
Kitkat1
 one year ago
A pencil at a stationery store costs $1, and a pen costs $1.50. Stella spent $21 at the store. She bought a total of 18 items. Which system of equations can be used to find the number of pencils (x) and pens (y) she bought? (5 points) 1.5x + y = 21 x = 18y 18x + y = 21 x = 1.5y x + 1.5y = 21 x + y = 18 x + 18y = 21 x = 1.5y

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whpalmer4
 one year ago
Best ResponseYou've already chosen the best response.1Okay, if a pencil costs $1, and \(x\) represents the number of pencils, how do you write an expression for the amount of money spent on pencils?

Kitkat1
 one year ago
Best ResponseYou've already chosen the best response.0i think like the 3rd answer

whpalmer4
 one year ago
Best ResponseYou've already chosen the best response.1well, let's figure it out. how do you write the expression for the amount spent on pencils, if a pencil costs $1 and there are \(x\) pencils?

whpalmer4
 one year ago
Best ResponseYou've already chosen the best response.1what is the cost of 1 pencil?

whpalmer4
 one year ago
Best ResponseYou've already chosen the best response.1what is the cost of 2 pencils?

whpalmer4
 one year ago
Best ResponseYou've already chosen the best response.1what is the cost of 57 pencils? (btw, the $ goes in front)

whpalmer4
 one year ago
Best ResponseYou've already chosen the best response.1you get the cost by multiplying the cost of 1 item by the number of items, right?

Kitkat1
 one year ago
Best ResponseYou've already chosen the best response.0Im pretty sure the answer is the 3rd one

whpalmer4
 one year ago
Best ResponseYou've already chosen the best response.1so the cost of \(x\) pencils when pencils cost $1 each is \(\$1*x\) or \(1x\) or \(x\) if we assume the price is in dollars. Pens cost $1.50 each. If you have \(y\) pens, how much is that?

whpalmer4
 one year ago
Best ResponseYou've already chosen the best response.1I agree the answer is C: I'm trying to solidify your understanding of this so you never have to ask again, you'll just know the right answer. Worth a minute or two of your time, right? Yes, 1.5y is the expression for the cost of the pens. We know that we spent $21 on \(x\) pencils and \(y\) pens, so how do we write that in an equation?

whpalmer4
 one year ago
Best ResponseYou've already chosen the best response.1Very good. And if we know that we have a total of 18 items, how do we write that?

Kitkat1
 one year ago
Best ResponseYou've already chosen the best response.0Can u help me with one more?

whpalmer4
 one year ago
Best ResponseYou've already chosen the best response.1Excellent. For a medal of your own, how many pens and pencils?

Kitkat1
 one year ago
Best ResponseYou've already chosen the best response.0The equation 2.2x – 4.4 = 1.8x can be transformed to form which of the following expressions? 4.0x = 4.4 0.4x = –4.4 0.4x = 4.4 4.0x = –4.4 Can u help me with this one?

whpalmer4
 one year ago
Best ResponseYou've already chosen the best response.1No, 18 pens and 21 pencils doesn't add up to 18 items, does it?

whpalmer4
 one year ago
Best ResponseYou've already chosen the best response.1Come on, you aren't thinking. The total number of pens + pencils is 18. The total cost is $21. Well, whatever. Let's do your other problem. \[2.2x – 4.4 = 1.8x\] What happens if you subtract \(1.8x\) from both sides?

Kitkat1
 one year ago
Best ResponseYou've already chosen the best response.0so 0.4x in the beginning

whpalmer4
 one year ago
Best ResponseYou've already chosen the best response.1\[2.2x4.41.8x=1.8x1.8x\]\[2.2x1.8x4.4 = 0x\]\[0.4x4.4=0\] Now we add 4.4 to both sides: \[0.4x4.4+4.4=0+4.4\]\[0.4x=4.4\]
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